Factorial Calculator
Calculate factorials with step-by-step display
🔒 Files never leave your browser
Factorial Calculator
Supports 0 through 170 for standard display, and uses BigInt for exact results.
Permutations & Combinations
How to Use Factorial Calculator
Enter n
Type a number (0-170 for standard, larger with BigInt).
View result
See n! with step-by-step multiplication.
nPr / nCr
Enter r to calculate permutations and combinations.
Why Choose AllTools Factorial Calculator?
- ✓ 100% free, no account needed
- ✓ Step-by-step breakdown
- ✓ Permutations nPr
- ✓ Combinations nCr
- ✓ BigInt for large numbers
- ✓ No data stored or transmitted
Why Use This Tool
- ★ Instant calculations with no server round-trip
- ★ Completely free with no usage limits
- ★ No account or registration required
- ★ Accurate results using standard mathematical formulas
- ★ Works on any device including phones and tablets
Related Resources
Frequently Asked Questions
What is factorial? ▼
n! = n × (n-1) × (n-2) × ... × 1. For example, 5! = 120.
Is this private? ▼
Yes. All calculations happen in your browser.
Is there a file size limit? ▼
No strict limit. Processing happens in your browser, so capacity depends on your device memory. Most files work smoothly.
Which browsers are supported? ▼
All modern browsers including Chrome, Firefox, Safari, Edge, and Opera on both desktop and mobile.
Can I use this offline? ▼
Yes. Once the page is loaded, the tool works without an internet connection since all processing is local.
Is my data secure? ▼
Yes. Your data never leaves your browser. Nothing is stored on or transmitted to any server.
Related Tools
Math
Prime Number Checker
Check primes, find factorization, and list primes up to N
Math
Fibonacci Generator
Generate Fibonacci sequences and golden ratio
Math
Scientific Calculator
Scientific calculator with trig, log, and powers
Math
Percentage Calculator
Calculate percentages, tips, discounts, and tax
Math
Binary Calculator
Binary arithmetic — add, subtract, multiply
Math
Roman Numeral Converter
Convert between decimal and Roman numerals — bidirectional